Apply Monkey Patch To Attempt To Fix Sidekiq Admin UI (#5634) [deploy]

* set sidekiq session to be the same as Rails to prevent forbidden UI errors

* monkey patch rack until new version is released to make Sidekiq Admin work

config/initializers/sidekiq.rb

@@ -1,7 +1,19 @@
-require "sidekiq/web"
-# Sidekiq sessions don't play well with Redis based sessions and Devise
-# <https://github.com/mperham/sidekiq/wiki/Monitoring#sessions-being-lost>
-Sidekiq::Web.set :sessions, false
+# Monkey patch `stringify_keys` to make rack 2.1.1 compatible with Sidekiq UI Admin panel.
+# Should be removed when 2.1.2 is released.
+# https://github.com/rack/rack/pull/1428
+module Rack
+  module Session
+    module Abstract
+      class SessionHash
+        private
+
+        def stringify_keys(other)
+          other.to_hash.transform_keys(&:to_s)
+        end
+      end
+    end
+  end
+end
 
 Sidekiq.configure_server do |config|
   sidekiq_url = ApplicationConfig["REDIS_SIDEKIQ_URL"] || ApplicationConfig["REDIS_URL"]

config/routes.rb

@@ -13,6 +13,9 @@ Rails.application.routes.draw do
   require "sidekiq/web"
   authenticated :user, ->(user) { user.tech_admin? } do
     mount DelayedJobWeb, at: "/delayed_job"
+
+    Sidekiq::Web.set :session_secret, Rails.application.secrets[:secret_key_base]
+    Sidekiq::Web.set :sessions, Rails.application.config.session_options
     mount Sidekiq::Web => "/sidekiq"
   end